Compact multi-ion accelerator treatment device and application thereof

The invention relates to a compact multi-ion accelerator treatment device and application thereof, the compact multi-ion accelerator treatment device comprises an integrated acceleration structure with a radio frequency quadrupole field acceleration characteristic and a positive cross rod drift tube linear acceleration characteristic, and the integrated acceleration structure comprises a radio frequency quadrupole field acceleration part and a positive cross rod drift tube linear acceleration part; the beam output end of the radio frequency quadrupole field acceleration part is connected with the beam input end of the positive cross rod drift tube linear acceleration part, and the two parts are of an integrated cavity structure with the same center line; the positive cross rod drift tube linear acceleration part comprises a first acceleration section, a second acceleration section and a three-combination quadrupole lens positioned between the first acceleration section and the second acceleration section; a p